Giza-Jū (Early Reeded-Edge 10-Yen)
ギザ十（10円青銅貨の初期ギザ縁）（giza-jū） ・ aka: 十円青銅貨
- Series
- Current coinage (10-yen bronze, edge variety)
- Denomination
- 10 yen
- Period
- Reeded-edge examples of the Shōwa 10-yen bronze coin
Updated: 2026-09-02
Specifications (as confirmed)
| Item | Value | Type | Sources |
|---|---|---|---|
| Composition (catalog) | 銅95/亜鉛4-3/錫1-2 | Catalog value | [1] |
FACTThe 10-yen bronze coin is 95% copper, 4–3% zinc and 1–2% tin (catalog table of current coin compositions).[1]
Historical Context
Open Items
INTERPRETATIONThe years and reason for adopting/dropping the reeded edge are not yet confirmed in consulted sources (the vending-machine-sensor story was removed as unsourced). Mint records remain to be obtained.
INTERPRETATIONSpecifications not stated here (weight, fineness, mintage, etc.) are not yet confirmed in the sources consulted. They will be added as they are confirmed.
Auction Records
No auction records confirmed for this exact type yet. Prices for the broader category are not shown as this type's prices. Confirmed records will be listed here.
References
- [1]「貨幣博物館 常設展示図録（今のお金はどんな金属からできている？）」（日本銀行金融研究所 貨幣博物館） — https://www.imes.boj.or.jp/cm/collection/tenjizuroku/mod/book/pageindices/index88.html（accessed: 2026-09-02）